Argentojarosite - Sold

Tintic Standard mine

Tintic District

Juab County

Utah

U.S.A.

3.6 by 3.5 by 2.6 cm – Miniature specimen (fits into a 5 cm cube)

Argentojarosite is a silver iron sulfate hydrate. Schaller (1923) announced the mineral name, and named it for its relationship to jarosite and silver (Latin argentum) content. Later, Schempp (1923) published a complete description. This is the first silver mineral containing oxygen discovered. Despite the extremely thin nature of the crystals, Groat et al. (2003) successfully refined the crystal structure of argentojarosite. This piece is from the type locality, where the mineral served as silver ore. An aged yellow note accompanying this specimen states this ore carries 5,000 ounces per ton silver. This specimen is a compact mass of scaly crystals, apparently a vein filling. 56 grams.